Subaru Legacy 2003 Service Manual page 2804

Contents
Front left wheel
Front right wheel
ABS sensor*2
(Wheel speed sensor)
Rear left wheel
Rear right wheel
Valve relay power supply
Motor relay power supply
power supply
G sensor*2 ground
output
Stop light switch*1
ABS warning light*2
AT ABS signal*2
(AT model only)
ABS operation signal monitor*2
Data is received.
Select monitor*2
Data is sent.
Terminal No. 3
ABS diagnosis connec-
tor*2
Terminal No. 6
Power supply*1
Grounding line
Grounding line
*1: Measure the I/O signal voltage after removing the connector from the ABSCM&H/U terminal.
*2: Measure the I/O signal voltage at connector (B62) or (F55).
CONTROL MODULE I/O SIGNAL
Terminal No.
(+)—(−)
9—10
11—12
7—8
14—15
24—23
25—23
30—28
28
6—28
2—23
22—23
31—23
3—23
20—23
5—23
29—23
4—23
1—23
23
26
ABS-13
Input/Output signal
Measured value and measuring conditions
0.12 — 1 V
(When it is 20 Hz.)
10 — 15 V
10 — 15 V
4.75 — 5.25 V
2.3±0.2 V when vehicle is in horizontal position.
Less than 1.5 V when the stop light is OFF and, 10 — 15 V
when the stop light is ON.
Less than 1.5 V during 1.5 seconds when ignition switch is ON,
and 10 — 15 V after 1.5 seconds.
Less than 1.5 V when the ABS control still operates and more
than 5.5 V when ABS does not operate.
Less than 1.5 V when the ABS control still operates and more
than 5.5 V when ABS does not operate.
Less than 1.5 V when no data is received.
4.75 — 5.25 V when no data is sent.
10 — 15 V when ignition switch is ON.
10 — 15 V when ignition switch is ON.
10 — 15 V when ignition switch is ON.
ABS (DIAGNOSTICS)
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